There are many unreliable and biased ISP comparisons out there but I came across an interesting report from the Federal Communication Commission: "Measuring Broadband America - A Report on Consumer Wireline Broadband Performance in the U.S.".

The report is available there. It compares Internet Service Providers using various criterias, including actual vs advertised performance. If you're shopping for a Broadband ISP, take a look and draw your own conclusions...

For now I'm staying with Comcast Cable Internet. I will check again when/if Verizon FiOS ever becomes available here.